Montezuma Castle in Arizona

A visit to Montezuma Castle is definitely one of the necessary things to do in Flagstaff for anyone interested in cliff dwellings. As one of the best-preserved North American cliff dwellings, the 20-room ancient apartment complex gives a fascinating glimpse into the past. The ruins are viewable from a 1/3-mile, self-guided trail through a beautiful sycamore grove, and the museum offers insights into what it was like to live in such a harsh climate 1,000 years ago.